... .breaking elongation:about 200% Colored clear silicone stopper as follows: 1.Material: 100 % silicone rubber2.Hardness:between 20~80 shore A3 ... rubber products such as rubber stoppers for more than 10 years,different kinds of materials are able to be provided for you,such as silicone ... protects against the sharp edges of drilled or punched holes for wiring, cable, tubing, piping,hoses, air lines, rope ...